CN1131778A - Wireless automatic alarm for identifying master - Google Patents
Wireless automatic alarm for identifying master Download PDFInfo
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- CN1131778A CN1131778A CN 95107892 CN95107892A CN1131778A CN 1131778 A CN1131778 A CN 1131778A CN 95107892 CN95107892 CN 95107892 CN 95107892 A CN95107892 A CN 95107892A CN 1131778 A CN1131778 A CN 1131778A
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- 239000000523 sample Substances 0.000 claims abstract description 22
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 13
- 230000005540 biological transmission Effects 0.000 claims description 13
- 229910052710 silicon Inorganic materials 0.000 claims description 13
- 239000010703 silicon Substances 0.000 claims description 13
- 230000003111 delayed effect Effects 0.000 claims description 6
- 239000003990 capacitor Substances 0.000 claims description 5
- 230000000295 complement effect Effects 0.000 claims description 5
- 238000005070 sampling Methods 0.000 claims description 4
- 230000010355 oscillation Effects 0.000 claims description 3
- 230000009545 invasion Effects 0.000 claims description 2
- 238000012544 monitoring process Methods 0.000 abstract description 7
- 238000012423 maintenance Methods 0.000 abstract 1
- 230000000007 visual effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000006870 function Effects 0.000 description 3
- 230000002441 reversible effect Effects 0.000 description 3
- 230000001960 triggered effect Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000002153 concerted effect Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000006386 memory function Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 230000003534 oscillatory effect Effects 0.000 description 1
- 238000009527 percussion Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
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Abstract
A wireless automatic alarm for identifying a master comprises an alarm transmitter, a wireless monitoring unit and a wireless monitoring unit, wherein the alarm transmitter comprises a probe, a storage battery, a coder, a frequency modulation transmitter and a transmitting antenna; the alarm receiver comprises a receiving antenna, a frequency modulation receiver, a decoder, an audible and visual alarm and a battery. The automatic charger is arranged at the input end of the storage battery, and the owner identification control switch is arranged between the probe and the output end of the storage battery. The alarm can be monitored remotely, the master does not give an alarm when entering the door, and a thief enters the room to give an alarm automatically, so that the alarm is accurate, the anti-damage capability is strong, the maintenance is free, and the use is convenient. It is suitable for automatic remote monitoring and security in residence, warehouse, bank, etc.
Description
The invention belongs to burglar alarm, especially a kind of radio automatic alertor capable of recogniting owner of remote monitor security personnel usefulness.Be applicable to strange land monitoring security personnel such as family, warehouse, shop, bank.
People's (about 3-5 kilometer) work of leaving home, study, work in the scope of this area mostly, unmanned in the family; Though the warehouse that has, shop, bank's Attended mode in evening are neglected unavoidably and are stolen.If a kind of radio automatic alertor capable of recogniting owner is installed, owner enters and does not report to the police, and the burglar forces open the door, window is entered the room and sent sound and light alarm from trend owner outside more, takes suitable security measures, arrests criminal.This class safety precaution product is that maintain social stability will be brought into play greatly effect.
The present invention designs for this reason, is wired alarming " identification owner the burglar alarm " (China Patent No.: 90207794.5) a kind of improvement of patented technology that the inventor has applied for.
Common high pitch high light warning device on the market is realized reporting to the police on the spot.Advantage is to make the invador cause stress, reaches deterrent effect, and the masses note around attracting, and make a concerted effort to catch criminal.Its shortcoming is that criminal also finds warning device simultaneously, the one, do one's utmost to destroy, and the 2nd, make an escape.Another kind is the telephone automatic dialing alarm, and advantage is that the automatic monitoring in realization strange land is in time reported to the police to police or household.Shortcoming is when the burglar enters the room startup automatic dialing alarm device, can delay warning if run into busy tone; When just being cut off in advance by the burglar, telephone wire lost efficacy; And, cause distrust to this system in case mistake is dialled and will be disturbed police's public affair.
Another is the wireless anti-theft alarming device, in case find the robber, can be hidden and report to the police to strange land owner or security organ rapidly, avoided the shortcoming of above-mentioned two kinds of alarms.
In the CN2172891Y patent announcement, " a kind of general remote burglar alarm " disclosed, form by transmitting terminal and receiving end, it is characterized in that transmitting terminal has a sensor that is equivalent to ac power switch, (being RD627-D Doppler effect sensing probe), direct current regulation circuit, audio demodulator, radio-frequency oscillator and emitting antenna.Receiving end is made of receiving antenna and integrated circuit RX5020 and loudspeaker etc.
Be in the CN2108967U patent announcement similarly at notification number, disclosing a kind of " the full-automatic burglar alarm of identification owner ", is to monitor head infrared ray sensor, Fresnel lens, signal processing circuit, start time-delay and delayed alarm circuit mechanism with last routine difference.The control identification circuit is made of single-stage radio frequency sending set and superregeneration formula command reception executive circuit, and it is to handle the control identification circuit with decision alarm sound circuit working state by owner, differentiates it is owner or robber with this.
The former has wireless remote control, strange land and reports to the police, and remote control distance reaches 1Km, makes simple advantage, and shortcoming is that many of areals can interfere with each other when using and produce false alarm.And the latter has set up the control identification circuit, and owner enters the room and do not report to the police, and the robber enters and reports to the police automatically.Shortcoming is an inconvenient operation, before owner opens the door will with radio frequency sending set open, and everyone must be fully with an identical transmitter.Another shortcoming is that damage resistance is poor, and the burglar stops warning with the just same realization of a swept-frequency signal transmitter.
The weak point of above patented technology also is: must start shooting energising work for a long time during warning.As everyone knows, burglar alarm is security personnel's equipment of " A thousand days the country natures its soldiers and fall for one day's battle ", and guarding against continuously several years or not reporting to the police decades is most probably.And be subjected to electronic devices and components mission life and reliability effect, long-term energising operation, failsafe in the long like this time unavoidably.From the analysis of causes of present most of Failure Alarm devices, power fail accounts for the first place again.Do not find power supply energy long-time running in the above-mentioned patent documentation and non-maintaining record.
The objective of the invention is to develop a kind of owner's of identification wireless automatic alarming device, accumulator charges automatically, minimal power consumption during warning is reported to the police to the indoor remote monitor that carries out, and owner enters and do not report to the police, and the burglar enters the room and automatically reports to the police, reliable operation is reported to the police accurately, and anti-damage ability is strong, structure is light and handy, and is easy to use.
Purpose of the present invention realizes by following scheme.
A kind of radio automatic alertor capable of recogniting owner is made of alarm transmission machine and warning receiver, and the alarm transmission machine includes probe, accumulator, scrambler, frequency-modulated generator, frequency multiplier, power amplifier and emitting antenna and forms.Warning receiver includes receiving antenna, fremodyne, demoder, audible-visual annunciator and battery and forms, it is characterized in that said accumulator input end is provided with automatic charger, be provided with between probe and the output terminal of accumulator and discern owner's gauge tap, in establish and hide K switch
3Controllable silicon SCR
1Constitute time-delay start-up circuit, controllable silicon SCR with the delay circuit that is connected on the control utmost point
2Constitute warning memory circuit, controllable silicon SCR with the probe output terminal that is connected on the control utmost point
3Constitute delayed alarm circuit with the delay circuit that is connected on the control utmost point, the accumulator anode is through K
3With SCR
1Anode connects, and its negative electrode is through D
22With SCR
2Anode connects, and negative electrode connects the accumulator negative terminal, the output line of probe and SCR
2The control utmost point connect SCR
1Negative electrode also with SCR
3Anode link SCR
3Output relay termination J
2, its normally opened contact J
2-1Be connected on the power supply supply side of accumulator anode and scrambler, frequency-modulated generator and frequency multiplier.
Advantage of the present invention is: wireless transmission realizes far distance automatic monitor anti-theft warning, and design identification owner gauge tap is opened the door owner and do not reported to the police, and the burglar enters the room and reports to the police automatically, and anti-damage ability is strong, reports to the police accurately; Minimal power consumption during warning is provided with automatic charger and makes accumulator keep best storage state for a long time; Be provided with the coding and decoding circuit, anti-interference good, the same area is installed 1,000,000 and is independent of each other; Receiver structure is light and handy, and is easy to carry.
The drawing of accompanying drawing is described as follows:
Fig. 1 is a principle of work block diagram of the present invention;
Fig. 2 is a transmitter electrical schematic diagram of the present invention;
Fig. 3 is a receiver electrical schematic diagram of the present invention;
Fig. 4 is an automatic charger electrical schematic diagram of the present invention;
Fig. 5 is that the present invention discerns owner's gauge tap electrical schematic diagram;
Now in conjunction with the accompanying drawings enforcement of the present invention is described in further detail.
The inventor improves the radio automatic alertor capable of recogniting owner of design, is made of alarm transmission machine and warning receiver.The alarm transmission machine includes probe (1), accumulator (3), scrambler (5), frequency-modulated generator (6), frequency multiplier (7), power amplifier (8) and emitting antenna (9) and forms.Warning receiver includes receiving antenna (10), fremodyne (11), demoder (12), audible-visual annunciator (13) and battery (14) and forms.New design is that the input end at accumulator (3) is provided with automatic charger (4), is provided with between probe (1) and accumulator (3) output terminal and discerns owner's gauge tap (2).Establish in the gauge tap (2) and hide K switch
3, controllable silicon SCR
1Constitute time-delay start-up circuit, controllable silicon SCR
2Constitute the warning memory circuit, controllable silicon SCR
3Constitute delayed alarm circuit.The anode of accumulator (3) is through K
3With SCR
1Anode connects, and its negative electrode is through light emitting diode D
22With SCR
2Sun connects connection, and negative electrode connects accumulator (3) negative terminal.The output line and the SCR of probe (1)
2The control utmost point connects.SCR
1Negative electrode also with SCR
3Anode link SCR
3Negative electrode succeed electrical equipment J
2, its normally opened contact J
2-1Be connected on the power supply supply side of accumulator (3) anode and scrambler (5), frequency-modulated generator (6) and frequency multiplier (7).In order to alleviate J
2Contact current, power amplifier (8) can directly be powered by accumulator (3).This is that power amplifier (8) will end because during no pumping signal.
Principle of work is such: warning receiver is contained in needs the indoor of security personnel, when probe (1) detects human body access door, window or when indoor, probe (1) output pulse signal is delivered to identification owner's gauge tap (2), by in the SCR that establishes
2The warning memory circuit that constitutes pins, and also is provided with start delay circuit SCR in it
1With warning and delaying circuit SCR
3, cooperate and hide K switch
3, owner's gauge tap at the appointed time stops warning, and whether accumulator (3) current supply circuit enters alarm condition by identification owner's gauge tap (2) control with the decision transmitter.Automatic charger (4) charges the civil power step-down rectifier when the voltage of accumulator (3) drops to setting automatically, stops charging when voltage is charged to predetermined value automatically.Scrambler (5) can be established millions of address codes, converts the digit pulse of serial output to, and frequency-modulated generator (6) through frequency multiplier (7) frequency multiplication, carries out radio-frequency power by power amplifier (8) and amplifies, and is fed to emitting antenna (9) and sends.In 3-5 kilometer circumference, antenna (10) in the warning receiver that owner carries is delivered to fremodyne (11) to the frequency modulation electromagnetic wave, amplified, be demodulated to the digital signal that contains address code, delivering to demoder (12) compares, when the address code of establishing in the demoder was consistent, the output positive pulse triggered audible-visual annunciator (13) and reports to the police.Battery (14) is supplied with warning receiver circuit operate as normal.In identification owner's gauge tap (2), relay J
2Also be connected on BG
15, BG
16In the output loop of the complementation pipe multivibrator that constitutes.R
65And C
73Time constant determine its oscillation period, generally get 8-20S, R
63Decision J
2Pickup time, get 1-2S.Work as R
65Get 1M Ω, C
73Select 10 μ F, R
63During for 16K Ω, be 10S oscillation period, J
2Be 2S each pickup time.Design is to make transmitter work in intermittently state like this, is enough to the transmission of the anti-theft signal of coding is finished in 2S, has both helped circuit working, reduces radio interference again.
Controllable silicon SCR
1Constitute in the time-delay start-up circuit, chronotron is managed BG by complementation
12And BG
13Constituting normality is the single-shot trigger circuit of cut-off type.Output pulse commissure capacitor C
66An end and BG
13Collector connects, and the other end is connected on SCR
1The control utmost point.R
51And C
65Time constant decision output pulse width tw.Tw is calculated as follows:
tw0.4·β
12·β
13·R
51·C
65
If: β
12And β
13Be 50, R
51Be 100K Ω, C
65Be 10 μ F, then record SCR
1The time-delay ON time is 100S.When last owner leaves dwelling house, will hide K switch
3Be allocated to the start position of A, start delay circuit and SCR
1Energising.Because C
74One termination accumulator (3) anode, another termination BG
13Base stage, thereby the positive pulse of a start is through C
74Trigger NPN pipe BG
13Base stage and conducting, positive feedback makes BG
12Also conducting.C
65Charging current is from accumulator (3) anode → BG
12→ R
51→ BG
13Emitter junction → accumulator (3) negative terminal, through about 100s time, C
65Both end voltage is near accumulator (3) voltage, and charging current reduces to zero, and two complementary pipes are transformed into the normality of ending by conducting rapidly.BG
13Positive pulse of collector output is through C
66Be coupled to SCR
1The conducting that is triggered of the control utmost point, the alarm transmission machine begins to enter the state of alert.Owner shuts door, the window that probe (1) is housed or leaves dwelling house as long as finish start within 100s, is actuation of an alarm can not occur.Complementary pipe delay circuit can be made of 555 time base circuits, obviously is to lose normality to end and the advantage of not power consumption.
Controllable silicon SCR
3The delayed alarm circuit that constitutes is by unijunction transistor BG
14Constitute, it is serially connected in SCR
1And SCR
2Electric power loop in.Potentiometer W
2, resistor R
58With capacitor C
70Time constant decision output pulse delay time.Output pulse commissure capacitor C
71A termination BG
14B
2The utmost point, another termination SCR
3The control utmost point.Time delay, T can be calculated as follows:
Select W
2Be 680K Ω, R
58Be 51K Ω, C
70Get 100uF, get η=0.8-0.6, regulate W
2Time delay, T can adjust in the 5-40S scope.
The probe (1) preferably select magnetic switch for use, tongue tube be installed in the door, window fixed position, magnet steel is contained in movable position.The people is arranged with this door, when window is opened when the state of alert, magnet steel leaves tongue tube and makes its normally closed contact closure, and trigger current is from SCR
1The probe (1) of flowing through, current-limiting resistance R
66To SCR
2The control utmost point makes it conducting, light emitting diode D
22Luminous indication.Even this moment, door or window were shut immediately, even probe (1) is smashed, the lead-in wire of will pop one's head in again (1) is cut off or short circuit SCR
2Still keep conducting, realize the warning memory function, damage resistance is good.This moment unijunction transistor BG
14Startup work is exported a positive pulse through the 5-40S time and is triggered SCR
3Conducting.Relay J
2Will be along with BG
15, BG
16Complementation is managed the vibration of oscillatory circuit and is worked, and makes the alarm transmission machine enter alarm condition.If owner enters, will hide K switch in the scope at the fixed time
3Be allocated to the shutdown position of B, can stop warning.K
3Being allocated to C is emergency alarm, the direct and J of accumulator (3) anode this moment
2Connect and the realization emergency alarm.K
3Can be replaced by electronic password lock, just circuit structure uses complexity also inconvenient.As long as the alarm transmission machine is placed on the indiscoverable place of burglar, wants to find in the short time and hide K switch at the utmost point
3It is extremely difficult stoping warning.Realize thus that owner enters and do not report to the police, and the function that the burglar enters the room and reports to the police automatically.
Not power consumption when probe (1) selects for use the advantage of magnetic switch to be warning, easy for installation, the reliability that works long hours height, a plurality of magnetic switchs use the employing parallel connection method simultaneously.Also can select infrared ray, microwave and supersonic invasion detector for use, their warnings work of the time will switching on for a long time can influence the mission life of system; Electrical Interference simultaneously, wind and heat, even casement wave also can false alarm, cost is obviously much higher.Probe (1) selects for use temp-sensitive sensor just to constitute automatic fire alarm, selects for use vibration transducer also to can be used for vehicle anti-theft and reports to the police.
Automatic charger (4) is by charging transformer B, commutation diode D
11-14, charging current limiter triode BG
7Constitute.Sampling stabilivolt D overcharges
19With overdischarge sampling stabilivolt D
20Negative pole connect with accumulator (3) anode, anodal through current-limiting resistor R44, R47 respectively with triode BG
10, BG
11Base stage connect, their collector all with complex pipe BG
8, BG
9Base stage connect.Charge relay J
1Be connected on the equal set electrode of complex pipe.One group of normally opened contact J
1-1Be connected in the primary return of charging transformer B another group normally opened contact J
1-2With BG
11Base stage and emitter parallel connection.
If accumulator (3) nominal voltage is 12V, when dropping to 10.8V because of overdischarge, D
20End BG
11Also end; Because D
19Operating voltage be higher than D
20So, D
19And BG
10Also end.The base electrode bias resistance device R of complex pipe
46Provide working current to BG from accumulator (3) anode
9, BG
8And conducting, J
1Adhesive, one group of contact J
1-1Closure, transformer B connects civil power, D
11-14Form bridge rectifier circuit, BG
7Play metering function, be connected on the light emitting diode D of its base stage
15Both done the charging indication, and played pressure stabilization function again, stable operating voltage is 2V.As emitter resistor R
43When getting 6.2 Ω, maximum charging current is 0.2A.Adopt the pulsating current charging of not filtering, charging current is limited in again below the 0.2A, helps the long-term safety operation of accumulator (3).Another organizes contact J
1-2Closed self-locking is even rise to nominal value, D because of charging makes accumulator (3) voltage
20Puncture BG
11Still keep and end and the continuation charging.When accumulator (3) when voltage is elevated to 13.8V, D
19Begin breakdown, BG
10Conducting thereupon, BG
3, BG
9The base stage bias current of complex pipe is turn-offed J by short circuit
1Discharge J
1-1And J
1-2Disconnect simultaneously, charging stops automatically.Automatic charger (4) breaks away from civil power, and security is good.C
61And R
41Be connected in parallel on J
1-1The spark that produces when going up with elimination work.D
16Be connected in reverse parallel in BG
7On be protection charging current limiter triode.D
17Be connected in reverse parallel in J
1On be reverse impulse electric current when absorbing relay work.BG
8And BG
9Form complementary complex pipe, can choose big resistance base resistance R
46With voltage monitoring diode current-limiting resistance R
44, R
47The daily monitoring current of automatic charger of the present invention (4) is 0.1mA only.Automatic charger (4) makes accumulator keep best storage state for a long time.
Scrambler IC in the alarm transmission machine
1Be MC145026, frequency-modulated generator IC
2Be MC2833.Address code and numerical code all merge use and can reach 1,000,000 kinds of sign indicating numbers and do not repeat.Also can the similar coding integrated circuit of usability, as VD5026, VM3758-108A.IC
2Also available MC2831 substitutes.Because they all adopt crystal JT frequency stabilization, triode BG
1Frequency multiplication, BG
2And BG
3Carry out radio-frequency power and amplify C
28, C
29, C
30And L
11, L
12Form wave filter, the spuious width of cloth of transmitter is penetrated reduced to minimum, frequency of operation is stable.
Receiver IC in the warning receiver
3Being MC3363, is monolithic FM reception integrated circuit, low-power consumption, and high sensitivity, multiple functional.Demoder IC
4Be MC145028, equally also can select the similar decoding integrated circuit of performance for use, as VD5028, VM3758-108AM.Voice guard is selected all-in-one micro news Chinese percussion instrument y for use, makes whole warning receiver integrated level height, and delicate structure is easy to carry.
Claims (6)
1, radio automatic alertor capable of recogniting owner, constitute by alarm transmission machine and warning receiver, the alarm transmission machine includes probe, accumulator, scrambler, frequency-modulated generator, frequency multiplier, power amplifier and emitting antenna and forms, warning receiver includes receiving antenna, fremodyne, demoder, audible-visual annunciator and battery and forms, it is characterized in that said accumulator input end is provided with automatic charger, be provided with between probe and the output terminal of accumulator and discern owner's gauge tap, in establish and hide K switch
3, controllable silicon SCR
1Constitute time-delay start-up circuit, controllable silicon SCR with the delay circuit that is connected on the control utmost point
2With the warning memory circuit that the probe output terminal that is connected on the control utmost point constitutes, controllable silicon SCR
3Constitute delayed alarm circuit with the delay circuit that is connected on the control utmost point, the accumulator anode is through K
3With SCR
1Anode connects, and its negative electrode is through D
22With SCR
2Anode connects, and negative electrode meets accumulator negative terminal, SCR
1Negative electrode also with SCR
3Anode link SCR
3Output relay termination J
2, its normally opened contact J
2-1Be connected on the power supply supply side of accumulator anode and scrambler, frequency-modulated generator and frequency multiplier.
2,, it is characterized in that said automatic charger is by charging transformer B, commutator tube D according to the described radio automatic alertor capable of recogniting owner of claim 1
11-14, charging current limiter triode BG
7Constitute, sampling stabilivolt D overcharges
19With overdischarge sampling stabilivolt D
20Negative pole connect with the accumulator anode, anodal through current-limiting resistor respectively with triode BG
10, BG
11Base stage connect, their collector all with complex pipe BG
3, BG
9Base stage connect charge relay J
1Be connected on the equal set electrode of complex pipe.
3,, it is characterized in that in the said identification owner gauge tap relay J according to claim 1 or 2 described radio automatic alertor capable of recogniting owner
2Also be connected on complementary pipe multivibrator BG
15, BG
16Output loop in.
4,, it is characterized in that in the said identification owner gauge tap controllable silicon SCR according to claim 1 or 2 described radio automatic alertor capable of recogniting owner
1The time-delay start-up circuit that constitutes, chronotron is by BG
12And BG
13Constituting complementary pipe normality is the monostable circuit of cut-off type, output pulse commissure capacitor C
66One end and BG
13Collector connects, and the other end is connected on SCR
1The control utmost point, controllable silicon SCR
3The delayed alarm circuit that constitutes is by unijunction transistor BG
14Constitute, it is serially connected in SCR
1And SCR
2Electric power loop in, output pulse commissure capacitor C
71One terminate at BG
14B
2The utmost point, another termination SCR
3The control utmost point.
5, according to claim 1 or 2 described radio automatic alertor capable of recogniting owner, it is characterized in that said probe is a magnetic switch, also can be infrared ray, microwave, supersonic invasion detector or vibration transducer.
6, according to claim 1 or 2 described radio automatic alertor capable of recogniting owner, it is characterized in that the scrambler IC in the said alarm transmission machine
1Be MC145026, frequency modulated oscillations IC
2Be MC2833, the receiver IC in the warning receiver
3Be MC3363, demoder IC
4Be MC145028.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 95107892 CN1131778A (en) | 1995-08-06 | 1995-08-06 | Wireless automatic alarm for identifying master |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 95107892 CN1131778A (en) | 1995-08-06 | 1995-08-06 | Wireless automatic alarm for identifying master |
Publications (1)
Publication Number | Publication Date |
---|---|
CN1131778A true CN1131778A (en) | 1996-09-25 |
Family
ID=5076498
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN 95107892 Pending CN1131778A (en) | 1995-08-06 | 1995-08-06 | Wireless automatic alarm for identifying master |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN1131778A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105469472A (en) * | 2014-08-25 | 2016-04-06 | 珠海格力电器股份有限公司 | Intelligent access control method and system |
CN105575036A (en) * | 2016-01-29 | 2016-05-11 | 江苏华宁电子系统工程有限公司 | Alarm device for confidential cabinet electromagnetic wave leakage, alarm system and detection method |
-
1995
- 1995-08-06 CN CN 95107892 patent/CN1131778A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105469472A (en) * | 2014-08-25 | 2016-04-06 | 珠海格力电器股份有限公司 | Intelligent access control method and system |
CN105469472B (en) * | 2014-08-25 | 2019-01-15 | 珠海格力电器股份有限公司 | Intelligent entrance guard control method and system |
CN105575036A (en) * | 2016-01-29 | 2016-05-11 | 江苏华宁电子系统工程有限公司 | Alarm device for confidential cabinet electromagnetic wave leakage, alarm system and detection method |
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